The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Feb. 26, 2002
Filed:
May. 15, 2000
Applicant:
Inventors:
Dean Lee Johnson, Littleton, CO (US);
Terre Reingardt, Broomfield, CO (US);
Assignee:
Ball Corporation, Broomfield, CO (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B21D 4/104 ;
U.S. Cl.
CPC ...
B21D 4/104 ;
Abstract
The trimmed edge of a drawn and ironed aluminum alloy container body is heated to provide a substantially circumferentially uniform profile in the region adjacent an open end, prior to necking of such region. The temperature profile is sufficient to provide the region to be necked with an annealing temperature, preferably involving a temperature, at the trimmed edge, up to about 550 F. or more, before partial cooling. Annealing in this fashion is believed to improve formability in such a fashion that tensile and yield strength progressively increasing during the necking operations.